How problem difficulty and order influence programming education outcomes in online judge systems.

In this case, the difficulty of the problems in the competition does not exhibit a clear trend.

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On the other hand, there is a strong and highly significant negative correlation between problem difficulty and the number of participants.

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Specifically, when the slope value is greater than or equal to 0.05, it indicates an increasing trend in difficulty, suggesting that the earlier problems in the competition have relatively lower difficulty values, while the later problems have relatively higher difficulty values, i.e., “easy to difficult”.

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